How do switch blocks and selector blocks in GNU Radio work?
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These two get mixed up all the time in GNU Radio because they sound similar but solve slightly different problems. I’ll explain them intuitively first, then a bit more technically,…
Software
Push button blocks in GNU Radio, and how to continuously display a variable state such as the one changed by a push button or other mechanism
Is there push button block in GNU Radio Companion? Yep — there is 👍 In GNU Radio (QT GUI) you’ve got a couple of button-style options, depending on what behavior…
Data .txt Files & Timelapse Video of Data Collection of comparison between ezCol.py & ezColGR (GNU Radio version) on LRO-H2(SCRT) using same 150cm dish, feed and SDR 24-25/1/2026
These are both relatively long integration times on the Intel i5 MiniPC used for this experiment. The numbers are not equivalent – in both cases I attempted to obtain an…
How to use GLon.py in ezRA (Easy Radio Astronomy)
ezRA’s ezGLon.py program studies cross sections of the Milky Way, along one Galactic Longitude (GLon). ezRA’s ezGLon.py program processes *GLon.npz files. Above, the ezGLon.py program errored because it found *Gal.npz…
Easy Radio Astronomy Software (ezRA)
LRO-H2 Radio Telescope (150cm Solar Cooker Dish)
Radio observation in hydrogen line (1420MHz)
Hydrogen Line peak (H-Line, 1420 MHz) screen capture from ezCol.py capture software (part of ezRA suite) collecting data from a RTL-SDR Blog v3 Software Defined Radio on LRO-H2 radio telescope (150cm dish) on 22/1/2026
Converting a Python GNU Radio block into C++
Converting a Python GNU Radio block into C++ is very doable, but it’s not a mechanical translation — you’re moving from a runtime-defined block to a compiled, typed one that…
Is there a way of outputting a choice of text on screen dependent on the value of a variable in GNU Radio?
Yes — there are several ways to show text on screen in GNU Radio based on the value of a variable, and the best method depends on where the variable…
Active@ Disc Image of Andrew Sutkowski’s Linux Disc Image containing GNU Radio, SDR Play support, ezRA, ez-radio-astro.
Process for installation on a your PC – this PC will be wiped by this process so ensure it does not contain data you wish to preserve. This image was…
What is a Power User?
A power user is someone who uses a product, system, or piece of software far beyond basic or casual use, taking advantage of its advanced features, shortcuts, customizations, and integrations…
My own attempt at completing homework exercises from BAA GNU Radio Group Meeting 29/11/2025: Create an electronic keyboard which plays multiple music chords, and create an AM radio player
My GNU Radio Companion GRC file that plays multiple music chords: https://www.astronomy.me.uk/wp-content/uploads/2025/12/BAA-GNU-Radio-Meeting-Exercise-Chord-Selector-201225_GRC.zip Video showing the above GRC in action: My AM radio player (users can select from recorded IQ file…